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  • Comparative Studies. Non-European Languages/Literatures  (54)
  • 1
    Online Resource
    Online Resource
    Broadband modeling of sound propagation in shallow water with an irregular elastic bottom
    Acoustical Society of America (ASA) ; 2014
    In:  The Journal of the Acoustical Society of America Vol. 135, No. 4_Supplement ( 2014-04-01), p. 2302-2302
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 135, No. 4_Supplement ( 2014-04-01), p. 2302-2302
    Abstract: The purpose of this work is to study the propagation of broadband sound pulses in shallow water environments. It is essential for an underwater pulse propagation model to handle bottom interaction, range-dependence, and wide-angle propagation in shallow water. Therefore, a comparatively realistic model that consists of a fluid overlying an irregular elastic bottom is treated, where the effects of shear wave are included. The range-dependent seismo-acoustics problem in frequency-domain is solved by a parabolic equation model. Fourier synthesis of frequency-domain solutions is implemented to model the received time series of a broadband sound propagation. And parallel programming is tried to improve the computational efficiency. Dispersion characteristics are exhibited by multiple mode arrivals during the propagation, including the dispersion of normal modes and mode 0 (the Scholte wave). The dispersion analysis of normal modes and the Scholte wave are demonstrated under different types of elastic bottoms. Energy converting between trapped modes and leaky modes due to slope of bottom is also analyzed.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4877578
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2014
    detail.hit.zdb_id: 1461063-2
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  • 2
    Online Resource
    Online Resource
    A hybrid method to simulate elastic wave scattering of three-dimensional objects
    Acoustical Society of America (ASA) ; 2018
    In:  The Journal of the Acoustical Society of America Vol. 144, No. 4 ( 2018-10-01), p. EL268-EL274
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 144, No. 4 ( 2018-10-01), p. EL268-EL274
    Abstract: A hybrid method based on the finite-difference method and equivalence principle to simulate elastic wave scattering of three-dimensional objects is proposed. In this method, the near fields are first calculated in a rectangular volume containing the object by the finite-difference method. Then the displacements and tractions on a virtual surface are transformed to the far field by the application of the equivalence principle in elastodynamics. The feasibility is verified by comparing modeling results with the analytical solution for the canonical point force source radiation problem. Modeling for complex scatterer structures shows the advantage of this method in handling multi-scale scattering problems.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.5059332
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2018
    detail.hit.zdb_id: 1461063-2
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  • 3
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    Word order of numeral classifiers and numeral bases : Harmonization by multiplication
    Walter de Gruyter GmbH ; 2019
    In:  STUF - Language Typology and Universals Vol. 72, No. 3 ( 2019-09-25), p. 421-452
    Details
    In: STUF - Language Typology and Universals, Walter de Gruyter GmbH, Vol. 72, No. 3 ( 2019-09-25), p. 421-452
    Abstract: In a numeral classifier language, a sortal classifier (C) or a mensural classifier (M) is needed when a noun is quantified by a numeral (Num). Num and C/M are adjacent cross-linguistically, either in a [Num C/M] order or [C/M Num] . Likewise, in a complex numeral with a multiplicative composition, the base may follow the multiplier as in [ n×base ], e.g., san-bai ‘three hundred’ in Mandarin. However, the base may also precede the multiplier in some languages, thus [ base×n ]. Interestingly, base and C/M seem to harmonize in word order, i.e., [ n×base ] numerals appear with a [Num C/M] alignment, and [ base×n ] numerals, with [C/M Num] . This paper follows up on the explanation of the base-C/M harmonization based on the multiplicative theory of classifiers and verifies it empirically within six language groups in the world’s foremost hotbed of classifier languages: Sinitic, Miao-Yao, Austro-Asiatic, Tai-Kadai, Tibeto-Burman, and Indo-Aryan. Our survey further reveals two interesting facts: base-initial ([ base×n ]) and C/M-initial ([C/M Num] ) orders exist only in Tibeto-Burman (TB) within our dataset. Moreover, the few scarce violations to the base-C/M harmonization are also all in TB and are mostly languages having maintained their original base-initial numerals but borrowed from their base-final and C/M-final neighbors. We thus offer an explanation based on Proto-TB’s base-initial numerals and language contact with neighboring base-final, C/M-final languages.
    Type of Medium: Online Resource
    ISSN: 1867-8319 , 2196-7148
    URL: Article
    DOI: 10.1515/stuf-2019-0017
    RVK:
    EQ 1000
    RVK:
    EQ 5800
    RVK:
    ER 715
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2019
    detail.hit.zdb_id: 2244789-1
    detail.hit.zdb_id: 1149842-0
    SSG: 7,11
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  • 4
    Online Resource
    Online Resource
    Bottom volume scattering—Modeling and data analysis
    Acoustical Society of America (ASA) ; 1998
    In:  The Journal of the Acoustical Society of America Vol. 103, No. 5_Supplement ( 1998-05-01), p. 3060-3061
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 103, No. 5_Supplement ( 1998-05-01), p. 3060-3061
    Abstract: As part of the Acoustic Reverberation Special Research Program (ARSRP), low-frequency bottom scattering from a deep ocean sediment pond was measured using an omnidirectional source and a vertical line-receiving array deployed near the bottom. Sediment volume heterogeneities were found to be the major contributor to the measured scattered fields [Tang et al., J. Acoust. Soc. Am. 98, 508–516 (1995)]. Taking advantage of the experimental geometry, a model is developed which can generate realizations of three-dimensional random inhomogeneities in sediments and can simulate scattered fields based on these realizations using a perturbation approach. In this model, the broadband propagator (the Green’s function) is obtained using an exact numerical method. Therefore, the model can handle any layered sediment environments with scatterers distributed within any of the layers. The model predictions are compared to the experimental data across the available frequency band, and the results are favorable. [Work supported by ONR.]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.422813
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 1998
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  • 5
    Online Resource
    Online Resource
    Low-frequency acoustic backscattering by volumetric inhomogeneities in deep-ocean sediments
    Acoustical Society of America (ASA) ; 1995
    In:  The Journal of the Acoustical Society of America Vol. 98, No. 1 ( 1995-07-01), p. 508-516
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 98, No. 1 ( 1995-07-01), p. 508-516
    Abstract: An experiment to study acoustic backscattering from deep-ocean sediments was conducted in July 1993 as part of the Acoustic Reverberation Special Research Program sponsored by the Office of Naval Research. An acoustic source transmitting chirp signals in the frequency range 250–650 Hz and a 24-element vertical receiving array attached to the source were suspended near the seafloor over a sediment pond in the vicinity of the Mid-Atlantic Ridge. The array steered in the normal incidence (endfire) direction is used to determine the sediment structure, while the array steered at oblique angles is used to determine backscattering strength. It is found that the sediment is stratified with gentle horizontal changes, except for two irregular regions, with thicknesses of about 20 m, located approximately 18 and 60 m beneath the seafloor. These inhomogeneous regions are shown to be the dominant influence on the backscattered field, and the backscattering strength of each region as a function of grazing angle is estimated. It is found that the removal of coherent reflections from subbottom stratified layers is essential to the analysis of bottom backscattering phenomena.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.413641
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 1995
    detail.hit.zdb_id: 1461063-2
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  • 6
    Online Resource
    Online Resource
    Acoustic wave scattering by 3D variability of deep ocean sediments
    Acoustical Society of America (ASA) ; 1994
    In:  The Journal of the Acoustical Society of America Vol. 96, No. 5_Supplement ( 1994-11-01), p. 3329-3329
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 96, No. 5_Supplement ( 1994-11-01), p. 3329-3329
    Abstract: Volumetric inhomogeneities of marine sediments, especially their horizontal changes, are of great importance in understanding bottom scattering processes, but difficult to assess. Though certain theoretical models are available, so far little is known about sediment variability experimentally. During the 1993 ARSRP experiment, bottom scattering data over a sediment pond were obtained using the Deep Towed Acoustics/Geophysics System (DTAGS) near the bottom with its receiving acoustic array configured vertically. By analyzing this data set, the following results have been found: (1) The sediment is layered, but with gentle changes horizontally. (2) Beamforming in the normal direction of multiple pings reveals that there are two irregular sublayers at depths of about 16 and 60 m beneath the seafloor. Their thicknesses are both about 15–20 m. (3) Simulations based on a simple model compare favorably with the experimental data, and the results suggest that volumetric inhomogeneities can be identified by examining the ping-to-ping correlation of the vertically reflected field. (4) The backscattered field is determined by first subtracting the coherently reflected portion of the field and then beamforming the residual portion at the desired grazing angles; the behavior of the backscattered field correlates well with the aforementioned irregular sublayers. [Work supported by ONR.]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.410739
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 1994
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  • 7
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    Online Resource
    Numerical study on radiation impedance of underwater sound sources in non-anechoic tank
    Acoustical Society of America (ASA) ; 2018
    In:  The Journal of the Acoustical Society of America Vol. 143, No. 3_Supplement ( 2018-03-01), p. 1976-1976
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 143, No. 3_Supplement ( 2018-03-01), p. 1976-1976
    Abstract: The radiation impedance is an important index to evaluate the characteristics of underwater sound sources. In this study, a numerical method for calculating the radiation impedance of underwater sound sources using ACTRAN is proposed. The radiation impedance is calculated by extracting the sound pressure and velocity on the surface of the sound sources. To verify the accuracy of the numerical method, the radiation impedance of a pulsating sphere source is calculated and the results are in good agreement with the analytical results. The radiation impedance of an elastic spherical shell in air, anechoic tanks, and non-anechoic tanks is calculated and analyzed. The results show that when the frequency is lower than the lowest normal frequency, the radiation impedance of the elastic spherical shell in anechoic tanks and non-anechoic tanks is consistent. When there are normal modes in non-anechoic tank, the radiation impedance of the elastic spherical shell varies with the normal frequencies. The proposed method can be used to calculate and analyze the radiation impedance of complex structures in different environments.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.5036514
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2018
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  • 8
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    Online Resource
    Azimuthal shear-wave anisotropy measurement in a borehole: Physical modeling and dipole acoustic verification
    Acoustical Society of America (ASA) ; 2019
    In:  The Journal of the Acoustical Society of America Vol. 146, No. 2 ( 2019-08-01), p. EL129-EL134
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 146, No. 2 ( 2019-08-01), p. EL129-EL134
    Abstract: An anisotropic physical model is constructed to evaluate the anisotropy measurement. The model consists of a series of equally spaced thin limestone slab sheets cemented with concrete, resulting in a transversely isotropic medium. For the anisotropy measurement evaluation, the borehole model is tested by a standard multipole acoustic tool. The measurement finds an S-wave anisotropy magnitude about 20% and determines the fast S-wave polarization along the alignment direction of the slab sheets. The results of the work not only validate the borehole measurement technology, but also provide a testing facility for calibrating the measurement acoustic tool.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.5120551
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2019
    detail.hit.zdb_id: 1461063-2
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  • 9
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    Online Resource
    Effects of speech and sung speech training on speech prosody production by trilingual children with autism spectrum disorder
    Acoustical Society of America (ASA) ; 2020
    In:  The Journal of the Acoustical Society of America Vol. 148, No. 4_Supplement ( 2020-10-01), p. 2469-2469
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 148, No. 4_Supplement ( 2020-10-01), p. 2469-2469
    Abstract: Speech prosody can be used to distinguish old (topic) versus new (focus) information and rejecting incorrect alternative statement. It has been reported that children with autism spectrum disorder (ASD) may show abnormal prosody of either monotonic or exaggerated intonation and some of them may fail to mark focus. Though speech and musical training have shown to improve speech production by ASD children, no specific training methods have been proposed to improve the use of speech prosody to mark focus and few studies investigated tonal language speakers. We aim to test (1) whether Cantonese-speaking ASD children fail to mark focus in their native tonal language (2) whether trainings may improve the speech prosody processing (3) whether sung speech training is more effective than speech training? We recruited two training groups of Cantonese-speaking ASD children, a control group of ASD children and TD children. In the training tasks, we focused on improving the mapping between the acoustic cues and information structure. Our pilot results showed that speech and musical training improved the use of prosodic cues such as intensity and f0 in marking focus across various positions. However, ASD children may have difficulties in integrating all the prosodic cues across conditions.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.5146830
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2020
    detail.hit.zdb_id: 1461063-2
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  • 10
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    The predicted barrier effects in the proximity of tall buildings
    Acoustical Society of America (ASA) ; 2003
    In:  The Journal of the Acoustical Society of America Vol. 114, No. 2 ( 2003-08-01), p. 821-832
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 114, No. 2 ( 2003-08-01), p. 821-832
    Abstract: A ray model is developed and validated for the prediction of the insertion loss of barriers that are placed in front of a tall building in high-rise cities. The model is based on the theory of geometrical acoustics for sound diffraction at the edge of a barrier and multiple reflections by the barrier and façade surfaces. It is crucial to include the diffraction and multiple reflection effects in the ray model, as they play important roles in determining the overall sound pressure levels for receivers located between the façade and barrier. Comparisons of the ray model with indoor experimental data and wave-based boundary element formulation show reasonably good agreement over a broad frequency range. Case studies are also presented that highlight the significance of positioning the barrier relative to the noise-sensitive receivers in order to achieve improved shielding efficiency of the barrier.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.1593060
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2003
    detail.hit.zdb_id: 1461063-2
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